“Paleo valleys,” carved by ice age rivers and now underground, would possibly perchance offer spaces to recharge California’s depleted groundwater
Erica Gies is creator of Water Repeatedly Wins: Thriving in an Age of Drought and Deluge (College of Chicago Press, 2022). She wrote our December 2018 article “Sponge Cities” about restoring natural water sources in city areas. Credit rating: Nick Higgins
